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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Comet Gearbox Crunching
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<blockquote data-quote="chankly bore" data-source="post: 79895" data-attributes="member: 317"><p>A lot of your information seems incorrect. There should be six plain and five friction plates. The best plan is; 1.5 mm. plain nearest gearbox, then alternate friction and thin (1mm.) plain plates and 2mm. plain plate outermost. The clutch drum must be 1 1/2" deep to accommodate this. Springs should be 1 3/4" free length. There shouldn't be an adjuster in the centre of the alloy pressure plate. If you don't have the right drum, go for a new later type, fitted to some late Comets and machines such as Matchless with the GB52 gearbox. This will require new friction plates. You may also have the wrong centre. Check the mainshaft for runout and the condition of the splines. Do it up to gorilla strength after fitting the right locking tab. The Spares Co. has everything you need. Further information? just ask. Cheers, F5AB/2A/7945 since 1970 with an original clutch, plus Comet on Steroids (with a Newby clutch)</p></blockquote><p></p>
[QUOTE="chankly bore, post: 79895, member: 317"] A lot of your information seems incorrect. There should be six plain and five friction plates. The best plan is; 1.5 mm. plain nearest gearbox, then alternate friction and thin (1mm.) plain plates and 2mm. plain plate outermost. The clutch drum must be 1 1/2" deep to accommodate this. Springs should be 1 3/4" free length. There shouldn't be an adjuster in the centre of the alloy pressure plate. If you don't have the right drum, go for a new later type, fitted to some late Comets and machines such as Matchless with the GB52 gearbox. This will require new friction plates. You may also have the wrong centre. Check the mainshaft for runout and the condition of the splines. Do it up to gorilla strength after fitting the right locking tab. The Spares Co. has everything you need. Further information? just ask. Cheers, F5AB/2A/7945 since 1970 with an original clutch, plus Comet on Steroids (with a Newby clutch) [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Comet Gearbox Crunching
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